Breadfan
03-09-2010, 06:04 AM
Who here has replaced their master cylinder and what were the symptoms that lead you to do so? Was it worth it?
Secondly, I've searched many threads about bleeding brakes. Who has successfully bled and flushed their brake lines after such a job with no ill effects or air in the ABS unit?
Here's the deal, when I brake I hear a slight noise in the pedal assembly, and the brakes feel spongy. At a stoplight I notice the pedal will gradually sink down (not all the way but more than I would want in a car), and as it does this if I hold my foot steady I can tell the brakes let up a tad.
To me this indicates the master cylinder is letting fluid lightly seep past the seals. Brakes are fine otherwise and in normal driving haul you down from speed no issues.
But this doens't feel right and therefore I need to get it fixed, don't like having anything not feel right on the brakes.
I've replaced boosters and master cylinders on cars before, bled plenty of brakes, done brake lines even hard brake lines I custom made. So I am fine doing this job but the ABS unit and flushing the system is what worries me if it can be done by a DIY'er in their garage without the scan tool.
Am I better off carefully replaceing hte master cylinder and then letting the air bleed up and driving a few miles to the dealer for a full on flush/bleed?
Secondly, I've searched many threads about bleeding brakes. Who has successfully bled and flushed their brake lines after such a job with no ill effects or air in the ABS unit?
Here's the deal, when I brake I hear a slight noise in the pedal assembly, and the brakes feel spongy. At a stoplight I notice the pedal will gradually sink down (not all the way but more than I would want in a car), and as it does this if I hold my foot steady I can tell the brakes let up a tad.
To me this indicates the master cylinder is letting fluid lightly seep past the seals. Brakes are fine otherwise and in normal driving haul you down from speed no issues.
But this doens't feel right and therefore I need to get it fixed, don't like having anything not feel right on the brakes.
I've replaced boosters and master cylinders on cars before, bled plenty of brakes, done brake lines even hard brake lines I custom made. So I am fine doing this job but the ABS unit and flushing the system is what worries me if it can be done by a DIY'er in their garage without the scan tool.
Am I better off carefully replaceing hte master cylinder and then letting the air bleed up and driving a few miles to the dealer for a full on flush/bleed?